PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Pachyrukhos

Mammalia - Notoungulata

Taxonomy

Pachyrukhos was named by Ameghino (1885). It is not extant.

It was corrected as Pachyrucos by Lydekker (1894), Ameghino (1894) and Rovereto (1914); it was misspelled as Pachyrucos by Ameghino (1901), Sinclair (1908), Carroll (1988), Kramarz et al. (2010), Seoane et al. (2017), Vizcaíno et al. (2022) and Seoane et al. (2023).

It was assigned to Hegetotheridae by Ameghino (1894); to Pachyrucidae by Lydekker (1894); to Pachyrukhinae by Seoane et al. (2017); to Hegetotheriidae by Ameghino (1901), Sinclair (1908), Rovereto (1914), Carroll (1988), Kramarz et al. (2010) and Vizcaíno et al. (2022); and to Pachyrukhini by Seoane et al. (2023).

Species

Pachyrucos elongatus, Pachyrucos moyani, Pachyrucos politus, Pachyrucos teres, P. moyani (syn. P. teres, Pachyrucos absis, Pachyrucos naevius, Pachyrucos trivius), P. ngenwinkul, P. politus, P. tribius, Propachyrucos depressus, Propachyrucos medianus

Species lacking formal opinion data

P. moyanoi

Synonyms

Propachyrucos depressus was named by Roth (1898).

It was considered a nomen dubium by Seoane et al. (2019).
Propachyrucos medianus was named by Roth (1898).

It was considered a nomen dubium by Seoane et al. (2019).
Pedotherium was named by Burmeister (1888).

It was synonymized subjectively with Pachyrucos by Ameghino (1894).

Synonymy list

Year	Name and author
1885	Pachyrukhos Ameghino
1888	Pedotherium Burmeister
1894	Pachyrucos Ameghino p. 19
1894	Pachyrucos Lydekker p. 4
1898	Propachyrucos depressus Roth p. 37
1898	Propachyrucos medianus Roth p. 37
1901	Pachyrucos Ameghino p. 76
1908	Pachyrukhos Sinclair
1914	Pachyrucos Rovereto p. 116
1988	Pachyrukhos Carroll
2010	Pachyrukhos Kramarz et al.
2017	Pachyrukhos Seoane et al.
2022	Pachyrukhos Vizcaíno et al.
2023	Pachyrukhos Seoane et al.

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()

Rank	Name	Author
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Afrotheria	Stanhope et al. 1998
—	Paenungulatomorpha
—	Paenungulata	Simpson 1945
—	Sudamericungulata
order	Notoungulata
suborder	Typotheria	Zittel 1892
—	Hegetotheriidae	(Ameghino 1894)
—	Pachyrukhinae	(Kraglievich 1934)
—	Pachyrukhini
genus	Pachyrukhos	Ameghino 1885

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Pachyrukhos Ameghino 1885

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†Pachyrucos elongatus Moreno 1888

†Pachyrucos moyani Ameghino 1885

†Pachyrucos politus Ameghino 1902

†Pachyrucos teres Ameghino 1889

†Pachyrukhos moyani Ameghino 1885

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Invalid names: Pachyrucos absis Ameghino 1889 [synonym], Pachyrucos naevius Ameghino 1889 [synonym], Pachyrucos trivius Ameghino 1889 [synonym], Pachyrukhos teres Ameghino 1889 [synonym]

†Pachyrukhos ngenwinkul Solórzano et al. 2023

†Pachyrukhos politus Ameghino 1901

†Pachyrukhos tribius Ameghino 1889

Invalid names: Pedotherium Burmeister 1888 [synonym], Propachyrucos depressus Roth 1898 [nomen dubium], Propachyrucos medianus Roth 1898 [nomen dubium]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Maximum body mass:

1.3 kgs

Minimum body mass:

1.3 kgs

Body mass estimate:

1.3 kg

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

scansorialsubc

Diet:

herbivoreo

Reproduction:

viviparoussubc

Created:

2009-01-05 17:11:49

Modified:

2009-01-05 19:11:49

Source: s = species, o = order, subc = subclass, c = class, subp = subphylum

References: Hendy et al. 2009, Ji et al. 2002, MacFadden et al. 1996, Carroll 1988, Lillegraven 1979, Solórzano et al. 2023

Age range: base of the Burdigalian to the top of the Langhian or 20.44000 to 13.82000 Ma

Collections (22 total)

Time interval	Ma	Country or state	Original ID and collection number
Colhuehuapian	21.0 - 17.5	Argentina (Chubut)	Pachyrucos indet. (176441) P. politus (141368) P. sp. (232404)
Colhuehuapian - Burdigalian	21.0 - 15.97	Argentina (Chubut)	P. sp. (204204)
Burdigalian	20.44 - 15.97	Argentina (Chubut)	P. sp. (176205)
Burdigalian - Langhian	20.44 - 13.82	Argentina (Santa Cruz)	P. moyani (197691)
Santacrucian	17.5 - 16.3	Argentina (Santa Cruz)	P. moyani (87314 176589 176590 210637 210638) P. moyanoi (210153) P. sp. (176569 176570 176587 176588)
Santacrucian - Laventan	17.5 - 11.0	Chile (Bío Bío)	Paedotherium minor (140105)
Friasian	16.3 - 15.5	Chile	P. sp. (176666)
Friasian	16.3 - 15.5	Chile (Aisén)	P. sp. (139845)
Langhian - Serravallian	15.97 - 11.62	Argentina (Chubut)	P. moyani (215594 215595)
Colloncuran	15.5 - 13.8	Argentina (Río Negro)	P. sp. (140691)